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1 | // SPDX-License-Identifier: GPL-2.0-or-later | |
2 | /* | |
3 | * Code for encoding/decoding FPM messages that are in netlink format. | |
4 | * | |
5 | * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro | |
6 | * Copyright (C) 2012 by Open Source Routing. | |
7 | * Copyright (C) 2012 by Internet Systems Consortium, Inc. ("ISC") | |
8 | */ | |
9 | ||
10 | #include <zebra.h> | |
11 | ||
12 | #ifdef HAVE_NETLINK | |
13 | ||
14 | #include "log.h" | |
15 | #include "rib.h" | |
16 | #include "vty.h" | |
17 | #include "prefix.h" | |
18 | ||
19 | #include "zebra/zserv.h" | |
20 | #include "zebra/zebra_router.h" | |
21 | #include "zebra/zebra_dplane.h" | |
22 | #include "zebra/zebra_ns.h" | |
23 | #include "zebra/zebra_vrf.h" | |
24 | #include "zebra/kernel_netlink.h" | |
25 | #include "zebra/rt_netlink.h" | |
26 | #include "nexthop.h" | |
27 | ||
28 | #include "zebra/zebra_fpm_private.h" | |
29 | #include "zebra/zebra_vxlan_private.h" | |
30 | #include "zebra/interface.h" | |
31 | ||
32 | /* | |
33 | * af_addr_size | |
34 | * | |
35 | * The size of an address in a given address family. | |
36 | */ | |
37 | static size_t af_addr_size(uint8_t af) | |
38 | { | |
39 | switch (af) { | |
40 | ||
41 | case AF_INET: | |
42 | return 4; | |
43 | case AF_INET6: | |
44 | return 16; | |
45 | default: | |
46 | assert(0); | |
47 | return 16; | |
48 | } | |
49 | } | |
50 | ||
51 | /* | |
52 | * We plan to use RTA_ENCAP_TYPE attribute for VxLAN encap as well. | |
53 | * Currently, values 0 to 8 for this attribute are used by lwtunnel_encap_types | |
54 | * So, we cannot use these values for VxLAN encap. | |
55 | */ | |
56 | enum fpm_nh_encap_type_t { | |
57 | FPM_NH_ENCAP_NONE = 0, | |
58 | FPM_NH_ENCAP_VXLAN = 100, | |
59 | FPM_NH_ENCAP_MAX, | |
60 | }; | |
61 | ||
62 | /* | |
63 | * fpm_nh_encap_type_to_str | |
64 | */ | |
65 | static const char *fpm_nh_encap_type_to_str(enum fpm_nh_encap_type_t encap_type) | |
66 | { | |
67 | switch (encap_type) { | |
68 | case FPM_NH_ENCAP_NONE: | |
69 | return "none"; | |
70 | ||
71 | case FPM_NH_ENCAP_VXLAN: | |
72 | return "VxLAN"; | |
73 | ||
74 | case FPM_NH_ENCAP_MAX: | |
75 | return "invalid"; | |
76 | } | |
77 | ||
78 | return "invalid"; | |
79 | } | |
80 | ||
81 | struct vxlan_encap_info_t { | |
82 | vni_t vni; | |
83 | }; | |
84 | ||
85 | enum vxlan_encap_info_type_t { | |
86 | VXLAN_VNI = 0, | |
87 | }; | |
88 | ||
89 | struct fpm_nh_encap_info_t { | |
90 | enum fpm_nh_encap_type_t encap_type; | |
91 | union { | |
92 | struct vxlan_encap_info_t vxlan_encap; | |
93 | }; | |
94 | }; | |
95 | ||
96 | /* | |
97 | * netlink_nh_info | |
98 | * | |
99 | * Holds information about a single nexthop for netlink. These info | |
100 | * structures are transient and may contain pointers into rib | |
101 | * data structures for convenience. | |
102 | */ | |
103 | struct netlink_nh_info { | |
104 | /* Weight of the nexthop ( for unequal cost ECMP ) */ | |
105 | uint8_t weight; | |
106 | uint32_t if_index; | |
107 | union g_addr *gateway; | |
108 | ||
109 | /* | |
110 | * Information from the struct nexthop from which this nh was | |
111 | * derived. For debug purposes only. | |
112 | */ | |
113 | int recursive; | |
114 | enum nexthop_types_t type; | |
115 | struct fpm_nh_encap_info_t encap_info; | |
116 | }; | |
117 | ||
118 | /* | |
119 | * netlink_route_info | |
120 | * | |
121 | * A structure for holding information for a netlink route message. | |
122 | */ | |
123 | struct netlink_route_info { | |
124 | uint32_t nlmsg_pid; | |
125 | uint16_t nlmsg_type; | |
126 | uint8_t rtm_type; | |
127 | uint32_t rtm_table; | |
128 | uint8_t rtm_protocol; | |
129 | uint8_t af; | |
130 | struct prefix *prefix; | |
131 | uint32_t *metric; | |
132 | unsigned int num_nhs; | |
133 | ||
134 | /* | |
135 | * Nexthop structures | |
136 | */ | |
137 | struct netlink_nh_info nhs[MULTIPATH_NUM]; | |
138 | union g_addr *pref_src; | |
139 | }; | |
140 | ||
141 | /* | |
142 | * netlink_route_info_add_nh | |
143 | * | |
144 | * Add information about the given nexthop to the given route info | |
145 | * structure. | |
146 | * | |
147 | * Returns true if a nexthop was added, false otherwise. | |
148 | */ | |
149 | static int netlink_route_info_add_nh(struct netlink_route_info *ri, | |
150 | struct nexthop *nexthop, | |
151 | struct route_entry *re) | |
152 | { | |
153 | struct netlink_nh_info nhi; | |
154 | union g_addr *src; | |
155 | struct zebra_vrf *zvrf = NULL; | |
156 | struct interface *ifp = NULL, *link_if = NULL; | |
157 | struct zebra_if *zif = NULL; | |
158 | vni_t vni = 0; | |
159 | ||
160 | memset(&nhi, 0, sizeof(nhi)); | |
161 | src = NULL; | |
162 | ||
163 | if (ri->num_nhs >= (int)array_size(ri->nhs)) | |
164 | return 0; | |
165 | ||
166 | nhi.recursive = nexthop->rparent ? 1 : 0; | |
167 | nhi.type = nexthop->type; | |
168 | nhi.if_index = nexthop->ifindex; | |
169 | nhi.weight = nexthop->weight; | |
170 | ||
171 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
172 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
173 | nhi.gateway = &nexthop->gate; | |
174 | if (nexthop->src.ipv4.s_addr != INADDR_ANY) | |
175 | src = &nexthop->src; | |
176 | } | |
177 | ||
178 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
179 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
180 | /* Special handling for IPv4 route with IPv6 Link Local next hop | |
181 | */ | |
182 | if (ri->af == AF_INET) | |
183 | nhi.gateway = &ipv4ll_gateway; | |
184 | else | |
185 | nhi.gateway = &nexthop->gate; | |
186 | } | |
187 | ||
188 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX) { | |
189 | if (nexthop->src.ipv4.s_addr != INADDR_ANY) | |
190 | src = &nexthop->src; | |
191 | } | |
192 | ||
193 | if (!nhi.gateway && nhi.if_index == 0) | |
194 | return 0; | |
195 | ||
196 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_EVPN)) { | |
197 | nhi.encap_info.encap_type = FPM_NH_ENCAP_VXLAN; | |
198 | ||
199 | /* Extract VNI id for the nexthop SVI interface */ | |
200 | zvrf = zebra_vrf_lookup_by_id(nexthop->vrf_id); | |
201 | if (zvrf) { | |
202 | ifp = if_lookup_by_index_per_ns(zvrf->zns, | |
203 | nexthop->ifindex); | |
204 | if (ifp) { | |
205 | zif = (struct zebra_if *)ifp->info; | |
206 | if (zif) { | |
207 | if (IS_ZEBRA_IF_BRIDGE(ifp)) | |
208 | link_if = ifp; | |
209 | else if (IS_ZEBRA_IF_VLAN(ifp)) | |
210 | link_if = | |
211 | if_lookup_by_index_per_ns( | |
212 | zvrf->zns, | |
213 | zif->link_ifindex); | |
214 | if (link_if) | |
215 | vni = vni_id_from_svi(ifp, | |
216 | link_if); | |
217 | } | |
218 | } | |
219 | } | |
220 | ||
221 | nhi.encap_info.vxlan_encap.vni = vni; | |
222 | } | |
223 | ||
224 | /* | |
225 | * We have a valid nhi. Copy the structure over to the route_info. | |
226 | */ | |
227 | ri->nhs[ri->num_nhs] = nhi; | |
228 | ri->num_nhs++; | |
229 | ||
230 | if (src && !ri->pref_src) | |
231 | ri->pref_src = src; | |
232 | ||
233 | return 1; | |
234 | } | |
235 | ||
236 | /* | |
237 | * netlink_proto_from_route_type | |
238 | */ | |
239 | static uint8_t netlink_proto_from_route_type(int type) | |
240 | { | |
241 | return zebra2proto(type); | |
242 | } | |
243 | ||
244 | /* | |
245 | * netlink_route_info_fill | |
246 | * | |
247 | * Fill out the route information object from the given route. | |
248 | * | |
249 | * Returns true on success and false on failure. | |
250 | */ | |
251 | static int netlink_route_info_fill(struct netlink_route_info *ri, int cmd, | |
252 | rib_dest_t *dest, struct route_entry *re) | |
253 | { | |
254 | struct nexthop *nexthop; | |
255 | struct rib_table_info *table_info = | |
256 | rib_table_info(rib_dest_table(dest)); | |
257 | struct zebra_vrf *zvrf = table_info->zvrf; | |
258 | ||
259 | memset(ri, 0, sizeof(*ri)); | |
260 | ||
261 | ri->prefix = rib_dest_prefix(dest); | |
262 | ri->af = rib_dest_af(dest); | |
263 | ||
264 | if (zvrf && zvrf->zns) | |
265 | ri->nlmsg_pid = zvrf->zns->netlink_dplane_out.snl.nl_pid; | |
266 | ||
267 | ri->nlmsg_type = cmd; | |
268 | ri->rtm_table = table_info->table_id; | |
269 | ri->rtm_protocol = RTPROT_UNSPEC; | |
270 | ||
271 | /* | |
272 | * An RTM_DELROUTE need not be accompanied by any nexthops, | |
273 | * particularly in our communication with the FPM. | |
274 | */ | |
275 | if (cmd == RTM_DELROUTE && !re) | |
276 | return 1; | |
277 | ||
278 | if (!re) { | |
279 | zfpm_debug("%s: Expected non-NULL re pointer", __func__); | |
280 | return 0; | |
281 | } | |
282 | ||
283 | ri->rtm_protocol = netlink_proto_from_route_type(re->type); | |
284 | ri->rtm_type = RTN_UNICAST; | |
285 | ri->metric = &re->metric; | |
286 | ||
287 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) { | |
288 | if (ri->num_nhs >= zrouter.multipath_num) | |
289 | break; | |
290 | ||
291 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
292 | continue; | |
293 | ||
294 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE) { | |
295 | switch (nexthop->bh_type) { | |
296 | case BLACKHOLE_ADMINPROHIB: | |
297 | ri->rtm_type = RTN_PROHIBIT; | |
298 | break; | |
299 | case BLACKHOLE_REJECT: | |
300 | ri->rtm_type = RTN_UNREACHABLE; | |
301 | break; | |
302 | case BLACKHOLE_NULL: | |
303 | case BLACKHOLE_UNSPEC: | |
304 | ri->rtm_type = RTN_BLACKHOLE; | |
305 | break; | |
306 | } | |
307 | } | |
308 | ||
309 | if ((cmd == RTM_NEWROUTE | |
310 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
311 | || (cmd == RTM_DELROUTE | |
312 | && CHECK_FLAG(re->status, ROUTE_ENTRY_INSTALLED))) { | |
313 | netlink_route_info_add_nh(ri, nexthop, re); | |
314 | } | |
315 | } | |
316 | ||
317 | if (ri->num_nhs == 0) { | |
318 | switch (ri->rtm_type) { | |
319 | case RTN_PROHIBIT: | |
320 | case RTN_UNREACHABLE: | |
321 | case RTN_BLACKHOLE: | |
322 | break; | |
323 | default: | |
324 | /* If there is no useful nexthop then return. */ | |
325 | zfpm_debug( | |
326 | "netlink_encode_route(): No useful nexthop."); | |
327 | return 0; | |
328 | } | |
329 | } | |
330 | ||
331 | return 1; | |
332 | } | |
333 | ||
334 | /* | |
335 | * netlink_route_info_encode | |
336 | * | |
337 | * Returns the number of bytes written to the buffer. 0 or a negative | |
338 | * value indicates an error. | |
339 | */ | |
340 | static int netlink_route_info_encode(struct netlink_route_info *ri, | |
341 | char *in_buf, size_t in_buf_len) | |
342 | { | |
343 | size_t bytelen; | |
344 | unsigned int nexthop_num = 0; | |
345 | size_t buf_offset; | |
346 | struct netlink_nh_info *nhi; | |
347 | enum fpm_nh_encap_type_t encap; | |
348 | struct rtattr *nest, *inner_nest; | |
349 | struct rtnexthop *rtnh; | |
350 | struct vxlan_encap_info_t *vxlan; | |
351 | struct in6_addr ipv6; | |
352 | ||
353 | struct { | |
354 | struct nlmsghdr n; | |
355 | struct rtmsg r; | |
356 | char buf[1]; | |
357 | } * req; | |
358 | ||
359 | req = (void *)in_buf; | |
360 | ||
361 | buf_offset = ((char *)req->buf) - ((char *)req); | |
362 | ||
363 | if (in_buf_len < buf_offset) { | |
364 | assert(0); | |
365 | return 0; | |
366 | } | |
367 | ||
368 | memset(req, 0, buf_offset); | |
369 | ||
370 | bytelen = af_addr_size(ri->af); | |
371 | ||
372 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
373 | req->n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
374 | req->n.nlmsg_pid = ri->nlmsg_pid; | |
375 | req->n.nlmsg_type = ri->nlmsg_type; | |
376 | req->r.rtm_family = ri->af; | |
377 | ||
378 | /* | |
379 | * rtm_table field is a uchar field which can accommodate table_id less | |
380 | * than 256. | |
381 | * To support table id greater than 255, if the table_id is greater than | |
382 | * 255, set rtm_table to RT_TABLE_UNSPEC and add RTA_TABLE attribute | |
383 | * with 32 bit value as the table_id. | |
384 | */ | |
385 | if (ri->rtm_table < 256) | |
386 | req->r.rtm_table = ri->rtm_table; | |
387 | else { | |
388 | req->r.rtm_table = RT_TABLE_UNSPEC; | |
389 | nl_attr_put32(&req->n, in_buf_len, RTA_TABLE, ri->rtm_table); | |
390 | } | |
391 | ||
392 | req->r.rtm_dst_len = ri->prefix->prefixlen; | |
393 | req->r.rtm_protocol = ri->rtm_protocol; | |
394 | req->r.rtm_scope = RT_SCOPE_UNIVERSE; | |
395 | ||
396 | nl_attr_put(&req->n, in_buf_len, RTA_DST, &ri->prefix->u.prefix, | |
397 | bytelen); | |
398 | ||
399 | req->r.rtm_type = ri->rtm_type; | |
400 | ||
401 | /* Metric. */ | |
402 | if (ri->metric) | |
403 | nl_attr_put32(&req->n, in_buf_len, RTA_PRIORITY, *ri->metric); | |
404 | ||
405 | if (ri->num_nhs == 0) | |
406 | goto done; | |
407 | ||
408 | if (ri->num_nhs == 1) { | |
409 | nhi = &ri->nhs[0]; | |
410 | ||
411 | if (nhi->gateway) { | |
412 | if (nhi->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
413 | && ri->af == AF_INET6) { | |
414 | ipv4_to_ipv4_mapped_ipv6(&ipv6, | |
415 | nhi->gateway->ipv4); | |
416 | nl_attr_put(&req->n, in_buf_len, RTA_GATEWAY, | |
417 | &ipv6, bytelen); | |
418 | } else | |
419 | nl_attr_put(&req->n, in_buf_len, RTA_GATEWAY, | |
420 | nhi->gateway, bytelen); | |
421 | } | |
422 | ||
423 | if (nhi->if_index) { | |
424 | nl_attr_put32(&req->n, in_buf_len, RTA_OIF, | |
425 | nhi->if_index); | |
426 | } | |
427 | ||
428 | encap = nhi->encap_info.encap_type; | |
429 | switch (encap) { | |
430 | case FPM_NH_ENCAP_NONE: | |
431 | case FPM_NH_ENCAP_MAX: | |
432 | break; | |
433 | case FPM_NH_ENCAP_VXLAN: | |
434 | nl_attr_put16(&req->n, in_buf_len, RTA_ENCAP_TYPE, | |
435 | encap); | |
436 | vxlan = &nhi->encap_info.vxlan_encap; | |
437 | nest = nl_attr_nest(&req->n, in_buf_len, RTA_ENCAP); | |
438 | nl_attr_put32(&req->n, in_buf_len, VXLAN_VNI, | |
439 | vxlan->vni); | |
440 | nl_attr_nest_end(&req->n, nest); | |
441 | break; | |
442 | } | |
443 | ||
444 | goto done; | |
445 | } | |
446 | ||
447 | /* | |
448 | * Multipath case. | |
449 | */ | |
450 | nest = nl_attr_nest(&req->n, in_buf_len, RTA_MULTIPATH); | |
451 | ||
452 | for (nexthop_num = 0; nexthop_num < ri->num_nhs; nexthop_num++) { | |
453 | rtnh = nl_attr_rtnh(&req->n, in_buf_len); | |
454 | nhi = &ri->nhs[nexthop_num]; | |
455 | ||
456 | if (nhi->gateway) | |
457 | nl_attr_put(&req->n, in_buf_len, RTA_GATEWAY, | |
458 | nhi->gateway, bytelen); | |
459 | ||
460 | if (nhi->if_index) { | |
461 | rtnh->rtnh_ifindex = nhi->if_index; | |
462 | } | |
463 | ||
464 | rtnh->rtnh_hops = nhi->weight; | |
465 | ||
466 | encap = nhi->encap_info.encap_type; | |
467 | switch (encap) { | |
468 | case FPM_NH_ENCAP_NONE: | |
469 | case FPM_NH_ENCAP_MAX: | |
470 | break; | |
471 | case FPM_NH_ENCAP_VXLAN: | |
472 | nl_attr_put16(&req->n, in_buf_len, RTA_ENCAP_TYPE, | |
473 | encap); | |
474 | vxlan = &nhi->encap_info.vxlan_encap; | |
475 | inner_nest = | |
476 | nl_attr_nest(&req->n, in_buf_len, RTA_ENCAP); | |
477 | nl_attr_put32(&req->n, in_buf_len, VXLAN_VNI, | |
478 | vxlan->vni); | |
479 | nl_attr_nest_end(&req->n, inner_nest); | |
480 | break; | |
481 | } | |
482 | ||
483 | nl_attr_rtnh_end(&req->n, rtnh); | |
484 | } | |
485 | ||
486 | nl_attr_nest_end(&req->n, nest); | |
487 | assert(nest->rta_len > RTA_LENGTH(0)); | |
488 | ||
489 | done: | |
490 | ||
491 | if (ri->pref_src) { | |
492 | nl_attr_put(&req->n, in_buf_len, RTA_PREFSRC, ri->pref_src, | |
493 | bytelen); | |
494 | } | |
495 | ||
496 | assert(req->n.nlmsg_len < in_buf_len); | |
497 | return req->n.nlmsg_len; | |
498 | } | |
499 | ||
500 | /* | |
501 | * zfpm_log_route_info | |
502 | * | |
503 | * Helper function to log the information in a route_info structure. | |
504 | */ | |
505 | static void zfpm_log_route_info(struct netlink_route_info *ri, | |
506 | const char *label) | |
507 | { | |
508 | struct netlink_nh_info *nhi; | |
509 | unsigned int i; | |
510 | char buf[PREFIX_STRLEN]; | |
511 | ||
512 | zfpm_debug("%s : %s %pFX, Proto: %s, Metric: %u", label, | |
513 | nl_msg_type_to_str(ri->nlmsg_type), ri->prefix, | |
514 | nl_rtproto_to_str(ri->rtm_protocol), | |
515 | ri->metric ? *ri->metric : 0); | |
516 | ||
517 | for (i = 0; i < ri->num_nhs; i++) { | |
518 | nhi = &ri->nhs[i]; | |
519 | ||
520 | if (nhi->gateway) { | |
521 | if (ri->af == AF_INET) | |
522 | inet_ntop(AF_INET, nhi->gateway, buf, | |
523 | sizeof(buf)); | |
524 | else | |
525 | inet_ntop(AF_INET6, nhi->gateway, buf, | |
526 | sizeof(buf)); | |
527 | } else | |
528 | strlcpy(buf, "none", sizeof(buf)); | |
529 | ||
530 | zfpm_debug(" Intf: %u, Gateway: %s, Recursive: %s, Type: %s, Encap type: %s", | |
531 | nhi->if_index, buf, nhi->recursive ? "yes" : "no", | |
532 | nexthop_type_to_str(nhi->type), | |
533 | fpm_nh_encap_type_to_str(nhi->encap_info.encap_type) | |
534 | ); | |
535 | } | |
536 | } | |
537 | ||
538 | /* | |
539 | * zfpm_netlink_encode_route | |
540 | * | |
541 | * Create a netlink message corresponding to the given route in the | |
542 | * given buffer space. | |
543 | * | |
544 | * Returns the number of bytes written to the buffer. 0 or a negative | |
545 | * value indicates an error. | |
546 | */ | |
547 | int zfpm_netlink_encode_route(int cmd, rib_dest_t *dest, struct route_entry *re, | |
548 | char *in_buf, size_t in_buf_len) | |
549 | { | |
550 | struct netlink_route_info ri_space, *ri; | |
551 | ||
552 | ri = &ri_space; | |
553 | ||
554 | if (!netlink_route_info_fill(ri, cmd, dest, re)) | |
555 | return 0; | |
556 | ||
557 | zfpm_log_route_info(ri, __func__); | |
558 | ||
559 | return netlink_route_info_encode(ri, in_buf, in_buf_len); | |
560 | } | |
561 | ||
562 | /* | |
563 | * zfpm_netlink_encode_mac | |
564 | * | |
565 | * Create a netlink message corresponding to the given MAC. | |
566 | * | |
567 | * Returns the number of bytes written to the buffer. 0 or a negative | |
568 | * value indicates an error. | |
569 | */ | |
570 | int zfpm_netlink_encode_mac(struct fpm_mac_info_t *mac, char *in_buf, | |
571 | size_t in_buf_len) | |
572 | { | |
573 | size_t buf_offset; | |
574 | ||
575 | struct macmsg { | |
576 | struct nlmsghdr hdr; | |
577 | struct ndmsg ndm; | |
578 | char buf[0]; | |
579 | } *req; | |
580 | req = (void *)in_buf; | |
581 | ||
582 | buf_offset = offsetof(struct macmsg, buf); | |
583 | if (in_buf_len < buf_offset) | |
584 | return 0; | |
585 | memset(req, 0, buf_offset); | |
586 | ||
587 | /* Construct nlmsg header */ | |
588 | req->hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
589 | req->hdr.nlmsg_type = CHECK_FLAG(mac->fpm_flags, ZEBRA_MAC_DELETE_FPM) ? | |
590 | RTM_DELNEIGH : RTM_NEWNEIGH; | |
591 | req->hdr.nlmsg_flags = NLM_F_REQUEST; | |
592 | if (req->hdr.nlmsg_type == RTM_NEWNEIGH) | |
593 | req->hdr.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
594 | ||
595 | /* Construct ndmsg */ | |
596 | req->ndm.ndm_family = AF_BRIDGE; | |
597 | req->ndm.ndm_ifindex = mac->vxlan_if; | |
598 | ||
599 | req->ndm.ndm_state = NUD_REACHABLE; | |
600 | req->ndm.ndm_flags |= NTF_SELF | NTF_MASTER; | |
601 | if (CHECK_FLAG(mac->zebra_flags, | |
602 | (ZEBRA_MAC_STICKY | ZEBRA_MAC_REMOTE_DEF_GW))) | |
603 | req->ndm.ndm_state |= NUD_NOARP; | |
604 | else | |
605 | req->ndm.ndm_flags |= NTF_EXT_LEARNED; | |
606 | ||
607 | /* Add attributes */ | |
608 | nl_attr_put(&req->hdr, in_buf_len, NDA_LLADDR, &mac->macaddr, 6); | |
609 | nl_attr_put(&req->hdr, in_buf_len, NDA_DST, &mac->r_vtep_ip, 4); | |
610 | nl_attr_put32(&req->hdr, in_buf_len, NDA_MASTER, mac->svi_if); | |
611 | nl_attr_put32(&req->hdr, in_buf_len, NDA_VNI, mac->vni); | |
612 | ||
613 | assert(req->hdr.nlmsg_len < in_buf_len); | |
614 | ||
615 | zfpm_debug("Tx %s family %s ifindex %u MAC %pEA DEST %pI4", | |
616 | nl_msg_type_to_str(req->hdr.nlmsg_type), | |
617 | nl_family_to_str(req->ndm.ndm_family), req->ndm.ndm_ifindex, | |
618 | &mac->macaddr, &mac->r_vtep_ip); | |
619 | ||
620 | return req->hdr.nlmsg_len; | |
621 | } | |
622 | ||
623 | #endif /* HAVE_NETLINK */ |